Malvinas-slope water intrusions on the northern Patagonia continental shelf
The Patagonia continental shelf located off southeastern South America is bounded offshore by the Malvinas Current, which extends northward from northern Drake Passage (~55° S) to nearly 38° S. The transition between relatively warm-fresh shelf waters and Subantarctic Waters from the western boundar...
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ftdoajarticles:oai:doaj.org/article:3724d2a3070c41d284ecb409ef3ef6ca 2023-05-15T16:02:32+02:00 Malvinas-slope water intrusions on the northern Patagonia continental shelf A. R. Piola N. Martínez Avellaneda R. A. Guerrero F. P. Jardón E. D. Palma S. I. Romero 2010-03-01T00:00:00Z https://doaj.org/article/3724d2a3070c41d284ecb409ef3ef6ca EN eng Copernicus Publications http://www.ocean-sci.net/6/345/2010/os-6-345-2010.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/3724d2a3070c41d284ecb409ef3ef6ca Ocean Science, Vol 6, Iss 1, Pp 345-359 (2010) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2010 ftdoajarticles 2022-12-31T08:50:43Z The Patagonia continental shelf located off southeastern South America is bounded offshore by the Malvinas Current, which extends northward from northern Drake Passage (~55° S) to nearly 38° S. The transition between relatively warm-fresh shelf waters and Subantarctic Waters from the western boundary current is characterized by a thermohaline front extending nearly 2500 km. We use satellite derived sea surface temperature, and chlorophyll- a data combined with hydrographic and surface drifter data to document the intrusions of slope waters onto the continental shelf near 41° S. These intrusions create vertically coherent localized negative temperature and positive salinity anomalies extending onshore about 150 km from the shelf break. The region is associated with a center of action of the first mode of non-seasonal sea surface temperature variability and also relatively high chlorophyll- a variability, suggesting that the intrusions are important in promoting the local development of phytoplankton. The generation of slope water penetrations at this location may be triggered by the inshore excursion of the 100 m isobath, which appears to steer the Malvinas Current waters over the outer shelf. Article in Journal/Newspaper Drake Passage Directory of Open Access Journals: DOAJ Articles Patagonia Drake Passage |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 A. R. Piola N. Martínez Avellaneda R. A. Guerrero F. P. Jardón E. D. Palma S. I. Romero Malvinas-slope water intrusions on the northern Patagonia continental shelf |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
The Patagonia continental shelf located off southeastern South America is bounded offshore by the Malvinas Current, which extends northward from northern Drake Passage (~55° S) to nearly 38° S. The transition between relatively warm-fresh shelf waters and Subantarctic Waters from the western boundary current is characterized by a thermohaline front extending nearly 2500 km. We use satellite derived sea surface temperature, and chlorophyll- a data combined with hydrographic and surface drifter data to document the intrusions of slope waters onto the continental shelf near 41° S. These intrusions create vertically coherent localized negative temperature and positive salinity anomalies extending onshore about 150 km from the shelf break. The region is associated with a center of action of the first mode of non-seasonal sea surface temperature variability and also relatively high chlorophyll- a variability, suggesting that the intrusions are important in promoting the local development of phytoplankton. The generation of slope water penetrations at this location may be triggered by the inshore excursion of the 100 m isobath, which appears to steer the Malvinas Current waters over the outer shelf. |
format |
Article in Journal/Newspaper |
author |
A. R. Piola N. Martínez Avellaneda R. A. Guerrero F. P. Jardón E. D. Palma S. I. Romero |
author_facet |
A. R. Piola N. Martínez Avellaneda R. A. Guerrero F. P. Jardón E. D. Palma S. I. Romero |
author_sort |
A. R. Piola |
title |
Malvinas-slope water intrusions on the northern Patagonia continental shelf |
title_short |
Malvinas-slope water intrusions on the northern Patagonia continental shelf |
title_full |
Malvinas-slope water intrusions on the northern Patagonia continental shelf |
title_fullStr |
Malvinas-slope water intrusions on the northern Patagonia continental shelf |
title_full_unstemmed |
Malvinas-slope water intrusions on the northern Patagonia continental shelf |
title_sort |
malvinas-slope water intrusions on the northern patagonia continental shelf |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doaj.org/article/3724d2a3070c41d284ecb409ef3ef6ca |
geographic |
Patagonia Drake Passage |
geographic_facet |
Patagonia Drake Passage |
genre |
Drake Passage |
genre_facet |
Drake Passage |
op_source |
Ocean Science, Vol 6, Iss 1, Pp 345-359 (2010) |
op_relation |
http://www.ocean-sci.net/6/345/2010/os-6-345-2010.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/3724d2a3070c41d284ecb409ef3ef6ca |
_version_ |
1766398203033288704 |